The new MCUs also feature a True Random-Number Generator (TRNG) that streamlines development of security-conscious applications such as connected smart devices. The STM32L462 further enhances support for developing secure devices by integrating an AES-256 cryptographic hardware accelerator.

Other features include smart analog peripherals such as a 12-bit 5Msample/s ADC, internal voltage reference, and ultra-low-power comparators. There are multiple timers, a motor-control channel, temperature sensor, a capacitive-sensing interface, and the STM32L452 also has a crystal-less USB2.0 controller.

The Nucleo-64 board, NUCLEO-L452RE, provides an affordable and flexible way for users to try out new ideas and build prototypes. It integrates the ST-LINK/V2 probe-free debugger/programmer and can be expanded via Arduino-compatible headers.

NUCLEO-L452RE Development Board

Offering features unavailable in other ultra-low-power MCUs, the new STM32L4 devices deliver both high core performance and outstanding ultra-low-power efficiency. The EEMBC CoreMark score of 273 outperforms other ultra-low-power cores, while the ULPBench score of 245 confirms greater energy efficiency. Active-mode current of just 36µA/MHz enables longer runtime on small batteries and extends scope to create energy-neutral products powered from ambient sources.

Devices can be ordered now, in small-form-factor packages from QFN-48 to LQFP-100, including a 3.36 mm x 3.66 mm WLCSP. Prices start from $2.773 for the STM32L451CCU6 with 256 Kbytes Flash and 160 Kbytes SRAM in QFN-48, for orders of 10,000 pieces. Prices for development boards start at $14 for the legacy-compatible Nucleo-64 board (NUCLEO-L452RE), which is available now.